[FSSDK-10993] additional cleanup for project config manager (#977) #935

Job	Run time
lint	1m 18s
crossbrowser_and_umd_unit_tests	6h 0m 14s
unit_tests (16)	1m 37s
unit_tests (18)	1m 27s
unit_tests (20)	1m 24s
unit_tests (22)	1m 29s
fullstack_production_suite / test	3s
integration_tests / test	5s
lint_markdown_files / lint	48s
Coveralls coverage	4s
	6h 8m 29s

Provide feedback